Chemical solution mixing system and method of mixing chemical solutions

Abstract

A chemical mixing device includes a first supply line adapted to supply a first chemical solution, a second supply line adapted to supply a second chemical solution, a mixing vessel adapted to receive the first and second chemical solutions and to hold a mixing vessel chemical solution, a floating body disposed within the mixing vessel and adapted to rise to a level corresponding to a volume of the mixing vessel chemical solution; and a plurality of switches each adapted to provide a corresponding chemical solution supply measuring signal in response to the level of the floating body being equal to a corresponding fixed level, each of the fixed levels corresponding to a fixed volume of the mixing vessel chemical solution within the mixing vessel.

1 . A chemical solution mixing system, comprising: 
 a first supply line adapted to supply a first chemical solution;    a second supply line adapted to supply a second chemical solution;    a mixing vessel adapted to receive the first and second chemical solutions from the first and second supply lines and to hold a mixing vessel chemical solution comprising one or more of the first and second chemical solutions;    a floating body disposed within the mixing vessel and adapted to rise to a level corresponding to a volume of the mixing vessel chemical solution within the mixing vessel; and    a plurality of switches each adapted to provide a corresponding chemical solution supply measuring signal in response to the level of the floating body being equal to a corresponding fixed level, each of the fixed levels corresponding to a fixed volume of the mixing vessel chemical solution within the mixing vessel.    
   
   
       2 . The system of  claim 1 , further comprising a controller adapted to receive the chemical solution supply measuring signals from the plurality of switches and in response thereto to control the supply of the first and second chemical solutions by the first and second supply lines.  
   
   
       3 . The system of  claim 2 , further comprising: 
 a first supply valve provided in the first supply line; and    a second supply valve provided in the second supply line,    wherein the controller provides a first valve control signal to the first supply valve and a second valve control signal to the second supply valve.    
   
   
       4 . The system of  claim 3 , wherein the first valve control signal opens the first supply valve to supply the first chemical solution to the mixing vessel, and shuts off the first supply valve in response to the controller receiving the chemical solution supply measuring signal from a first one of the plurality of switches.  
   
   
       5 . The system of  claim 4 , wherein the second valve control signal opens the second supply valve to supply the second chemical solution to the mixing vessel in response to the controller receiving the chemical solution supply measuring signal from the first one of the plurality of switches, and shuts off the second supply valve in response to the controller receiving the chemical solution supply measuring signal from a second one of the plurality of switches.  
   
   
       6 . The system of  claim 1 , further comprising a measurement rod connected to the floating body and being adapted to switch the plurality of switches in response to the level of the floating body.  
   
   
       7 . The system of  claim 1 , further comprising: 
 a first flow meter provided in the first supply line; and    a second flow meter provided in the second supply line.    
   
   
       8 . A method of mixing chemical solutions, comprising: 
 supplying a first chemical solution to a mixing vessel;    stopping supplying the first chemical solution to the mixing vessel in response to a floating body within the mixing vessel rising to a first fixed level;    supplying a second chemical solution to the mixing vessel in response to the floating body within the mixing vessel rising to the first fixed level; and    stopping supplying the second chemical solution to the mixing vessel in response to the floating body within the mixing vessel rising to a second fixed level.    
   
   
       9 . The method of  claim 8 , further comprising: 
 supplying a third chemical solution to the mixing vessel in response to the floating body within the mixing vessel rising to the second fixed level; and    stopping supplying the third chemical solution to the mixing vessel in response to the floating body within the mixing vessel rising to a third fixed level.    
   
   
       10 . The method of  claim 8 , wherein the first chemical solution is supplied from a first supply line and the second chemical solution is supplied from a second supply line.  
   
   
       11 . The method of  claim 10 , wherein supplying the first chemical solution to the mixing vessel comprises providing a first valve control signal to a first supply valve provided in the first supply line to open the first supply valve, and wherein stopping supplying the first chemical solution to the mixing vessel comprises providing the first valve control signal to the first supply valve to shut off the first supply valve.  
   
   
       12 . The method of  claim 11 , wherein the first valve control signal shuts off the first supply valve in response to a first chemical solution supply measuring signal from a first switch activated in response to the floating body within the mixing vessel rising to the first fixed level.  
   
   
       13 . The method of  claim 12 , wherein supplying the second chemical solution to the mixing vessel comprises providing a second valve control signal to a second supply valve provided in the second supply line to open the second supply valve, and wherein stopping supplying the second chemical solution to the mixing vessel comprises providing the second valve control signal to the second supply valve to shut off the second supply valve.  
   
   
       14 . The method of  claim 13 , wherein the second valve control signal shuts off the second supply valve in response to a second chemical solution supply measuring signal from a second switch activated in response to the floating body within the mixing vessel rising to the second fixed level.  
   
   
       15 . A chemical solution mixing system, comprising: 
 a plurality of supply lines each adapted to supply a corresponding supplied chemical solution;    a mixing vessel adapted to receive the supplied chemical solutions from the plurality of supply lines and to hold a mixing vessel chemical solution comprising one or more of the supplied chemical solutions; and    means for providing a plurality of chemical solution supply measuring signals in response to a volume of the mixing vessel chemical solution within the mixing vessel reaching a corresponding plurality of fixed levels.    
   
   
       16 . The system of  claim 15 , further comprising a controller adapted to receive the chemical solution supply measuring signals from the plurality of switches and in response thereto to control the supply of the supplied chemical solutions from the plurality of supply lines.  
   
   
       17 . The system of  claim 16 , further comprising: 
 a floating body disposed within the mixing vessel and adapted to rise to a level corresponding to the volume of the mixing vessel chemical solution within the mixing vessel; and    a measurement rod connected to the floating body and being adapted to switch the plurality of switches in response to the level of the floating body.    
   
   
       18 . The system of  claim 16 , further comprising a plurality of supply valves, each of the supply valves being provided in a corresponding one of the plurality of supply lines, wherein the controller provides a plurality of valve control signals, each of the valve control signals being provided to a corresponding one of the plurality of supply valves.  
   
   
       19 . The system of  claim 18 , wherein each valve control signal shuts off the corresponding supply valve in response to the controller receiving a corresponding one of the chemical solution supply measuring signals from one of the plurality of switches.  
   
   
       20 . The system of  claim 15 , further comprising a plurality of flow meters each provided in corresponding one of the plurality of supply lines.